Shoe calk



Jan. 6, 1931. F. F. FIELD, JR 9 3 SHOE cALK Filed April 12, 1929 Patented its, e, 1931 uN1r* r harem o-FFrcs FRED F.

srxon CALK i 7 Application filed April 12,

My invention, which relates to shoe calks, and has among its objects the provision of a calk which, among other things, will be supported in in an. improved manner, and will prevent the adherence ol cakes oil? mud thereto, will be best understood from the 1 01- lowingdescription when read in the lightot the accompanying drawing of an embodiment thereof submitted for illustrative purposes, while the scope of the invention will be more particularly pointed out in the appended claim.

In the drawing a 1 is an elevation of the shoe calk construct ed according to the invention;

Fig. 2 is a plan according to Fig. 1;

3 illustrates one manner of securing the Call: to a sole leather, and is a section on the line 33 01" Fig. i, the latter being a plan according to Fig. 3.

Referring to the drawing, the shoe calk illliistrated comprises a t'rusto-eonical. body portion l, the latter having a flat circular base 3'01?- relatively large diameter and, opposite this base, a relatively steep frustoconical side 5, Goaxially formed with. the body portion at the apex thereof is a spike 7 having a relatively quick tapered trusto-conical surface 9, the construction being such to provide a much smaller angle a between the surfaces 5 and' 9 than heretofore employed in shoe calks.

1 have toinidthat by making the under side of the body portion rather steep, say by giving it a taper (it about i to 1,,2'i1'1 'l making the spikeota relatively quick taper, about Ilto 2, with the result thatthe angle a apr' proximately1% quadrants of circle, the

possibility of mud clinging to the spike is a bOdYiJOfiZIOD. abuttmg one side of said leather, a spike carried by sald bo'dy'portion';

practically eliminated, "especially when the body portion is of relatively large diameter,

say from about to f of an inch, a diameter of approximately inch under these condi- 'tions giving excellent results, i V i As illustrated,the body portion of the call:

1929. Serial No. 354,626.

is integrally formed with an axially positioned tubular rivet 11, the length of the rivet. and the thickness of its walls being such that when the rivet is secured to a sole leather of normal thickness, say one tron'i about {1; to A otan inch thi k, the flange 13 vformed by theriveting operationwill have a diameter of about taat of the body portion, this result preferably being secured by use of arivetset so shaped to flare outwardly the Walls of the shank of the rivet, as indicated at 15, this flare also minimizing radially splitting the flange, because the flange is not bent at as acute an angle as'it would he were the walls of the shanknotflared as with prior constructions where the splits 17 (Fig. 4) in the flange 13 are wide and extend radially inward t0 the bodyot the shank. h

I have found that with shoe calks heretotore constructed there is a tendency for the calk to cant with great discomfort to the wearer, especially it the calk becomes loosened. The outward'flaring of the walls of the tubular rivet according to thepresent invent-ion tends to expand the thickness oi the leather, between the flangelg and body portion 5, causing the calklirrnly to grip the leather and prevent. loosening of the calk,

tions from these may be made without dcparting from the spiritot the inventioin Claim: 1 A sole leather having a calk provided with a tubular part integral with said body por tion extendingthrough said leather, a comparatively narrow fian e carried by said tubular part abutting opposite side of FIELD, J31, or enocxron, ivmssecnusn'r'rs, AssIeNon r0 FIELD & FLINT oo., M or nnoox'ron, MASSACHUSETTS, A conrona'rron or MASSACHUSETTS said leatl1ei','the exterior diameter of which flange is relatively large, said tubular part having relatively quickly, outwardly and upwardly flaring Walls integral with said flange,

flange and tubular part may be formed Witbwhereby said leather may be expanded in thickness between said flange and body portion to prevent loosening of said ealk and said out-splitting of said tubular part or n aterial splittingrof said flange. V In testimony whereof, Ihave signed my name to this specification.

FRED F. FIELD, JR.

i so 

